Impulse-transmitting mechanism.



I. A. WOTTOPL IMPULSE TRANSMITTING MECHANISM.

APPLICATION FILED JULY 26, 191?. 1,288,350 Patented Dec. 17, 1918,.

2 SHEETS-SHEET l- //4 WM far.- Jfimrs A. Wo/fon.

J. A. WOTTON. IMPULSE TRANSMITTNG MECHAMSM.

APPLICATION FILED JULY 26, 1917.

041 21420/4 James /7. Wofion.

Patented Dec.17,1918.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFlfiFi.

JAMES A. WOTTON, OF MONTCLAIR, NEW JERSEY, ASSIGNOR TO WESTERN ELECTRIC COMPANY, INCORPORATED, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

IMPULSE-TRANSMITTING MECHANISM.

Specification of Letters Patent.

Patented Dec. 17, 1918.

To all whom it may concern:

Be it known that I, JAMES A. WOTTON, a citizen of the United States, residing at Montclair, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Impulse-Trans mitting Mechanism, of which the following is a full, clear, concise, and exact description.

This invention relates to impulse transmitting mechanism and more particularly to impulse transmitting mechanism in which a rotatable toothed wheel is adapted to engage contact springs to open and close a circuit associated therewith.

The object of this invention is to provide an impulse transmitting device of this type in which it is impossible to produce a false operation of the impulse wheel by forcing its operation before the mechanism has been set for the complete operation for which it is designed.

In accordance with the general features of this invention means are provided for holding the impulse transmitting wheel against rotation until the completion of the setting movement preparatory to a complete operation of the mechanism. More specifically the invention consists in the provision of a pivotal arm for normally holding the impulse wheel against rotation together with a disk rotatably mounted upon the driving shaft with which one end of the arm is normally engaged to hold it in its retaining position. A second disk carried by the shaft is adapted to engage the first mentioned disk at the end of the winding or setting movement to release it from the arm to permit the rotation of the impulse wheel.

In the drawings:

Figure 1 is a view in front elevation with parts broken away of a device embodying this invention; Fig. 2 is a sectional view of the device taken upon line 2-2 of Fig. 1;

' Fig. 3 is a view of the device looking at it from the back; Fig. 4c is a cross-sectional view taken upon line l4 of Fig. 2; and Fig. 5 is a view similar to Fig. 4 with parts of the device in operated position.

As shown in the drawings, 5 designates a notched impulse wheel adapted to cooperate with impulse springs 6, 7 and 8. The impulse wheel 5 is secured to a spindle 9 rotatably mounted between frame plates 10 and 11. The impulse wheel 5 is adapted to be driven from a gear 12 on a main shaft 13 through the medium of a pinion 14;, a gear 15 and a pinion 16 carried upon the spindle 9. Pro ecting from one face of the impulse wheel 5 is a pin 17 normally in engagement with a pin 18 on a pivotal spring pressed lever arm 19, the engagement of these two pins 17 and 18 serving to prevent the rotation of the impulse wheel 5. Loosely mounted upon the main shaft 13 is a disk 20 having a notch 21 in the periphery thereof within which a projection 22 on the lever arm 19 normally rests to retain the pins 17 and 18 in engagement. Secured to the main shaft 13 is a second disk 25 having its periphery cut away for approximately one third of its circumference to form shoulders 26 and 27 which are adapted in the rotation of the shaft 13 to engage a pin 28 secured to the disk 20 to move the pivotal lever arm 19 to start and stop the rotation of the impulse wheel 5. A spring 30 adapted to rotate the main shaft 13 is wound by means of a handle 31 attached to the outer end of the shaft 13. The handle 31 is turned through approximately a third of a revolution to store suflicient energy in the spring 30 to rotate the impulse wheel 5. As the shaft 13 is turned in response to the winding movement of the handle 31 the shoulder 26 of the disk 25 is brought toward the pin 28 of the disk 20 until at the time the lever 31 approaches the limit of its winding movement the shoulder 26 engages the pin 28 to rotate the disk 20 a sufiicient distance to cause it to disengage the notch 21 from the projection 22 of the lever 19 to bring a second and shallower notch 35 into engagement with the projection 22 of the lever 18. This movement of the lever 19 disengages pins 17 and 18 and permits the impulse wheel 5 to rotate when the handle 31 is released to return to normal position. As the shaft 13 and the handle 31 approach their normal position. the shoulder 27 on the disk 25 engages the pin 28 in the disk 20 to move said disk 20 into position where the notch 21 reengages the projection 22 of the lever 19 and moves the pin 18 into a path to be engaged by the pin 17 on the impulse wheel 5.

Secured to the inner face of the handle 31 is a pivotal pawl 40 adapted, as the arm 31 is operated to wind the spring 30, to engage the sloping faces of teeth 41, 41 of a curved rack 42. A release of the handle before the tripping position of the impulse Wheel 5 has been reached Will cause said pawl to to engage the abrupt faces of the teeth 41, 41, thereby preventing the handle 31 flying back to normal position and injuring the mechanism. When the handle 31 reaches the end of the Winding movement, a pin 43 in a base plate 44 engages a projection 45 on the pawl to raise the end of said pawl above the level of the teeth il, M, where it is held by means of a spring 46 engaging a knob 47 thereon. When the handie 31 reaches its normal position a pin 48 in the base plate 4:4 engages the upper surface of the pawl 40 to move it into position to again engage the teeth 41, etl in a succeeding operation.

What is claimed is:

1. In an impulse transmitting mechanism, an impulse Wheel, a rotatable shaft, a pivotal-arm normally holding said impulse Wheel against rotation, means carried by said shaft for normally retaining said lever in holding position, motor means for operating said shaft, means for turning said shaft in one direction to Wind said motor means, and means carried by said shaft for releasing said retaining means from said arm at the end of the normal Winding movement to'permit the rotation of said impulse Wheel.

2. In an impulse transmitting mechanism, an impulse Wheel, a rotatable shaft, a pivotal, arm normally holding said impulse Wheel against rotation, a notched disk ro tatably mounted upon said shaft and engaging said arm to hold it in its normal position, motor means for operating said shaft, means for turning said shaft in one direction to Wind said motor, and means carried by said shaft for releasing said notched disk from said arm at the end of the Winding movement to permit the rotation of saidimpulse Wheel.

3. In an impulse transmitting mechanism, an impulse Wheel, a rotatable shaft, a notched disk rotatably mounted upon said shaft, a pivotal arm normally retaining said impulse Wheel against rotation and having one end thereof resting in the notch of said disk, motor means for rotating said shaft in one direction, means for turning said shaft in the opposite direction to Wind said motor means, and means carried by the shaft for engaging said disk at the end of the Winding movement to move the notched portion thereof out of engagement With said arm to permit the rotation of said Wheel.

4:. In an impulse transmitting mechanism, an impulse Wheel, a rotatable shaft, a notched disk rotatably mounted upon said shaft, a projecting pin carried by said disk, a pivotal arm having one end thereof-resting in the notched portion of the said disk and normally retaining said against rotation, a spring motor for rotating said shaft in one direction, means for rotating said shaft in the opposite direction to Wind said spring, and a second disk secured to said shaft and adapted at the end of the Winding movement to engage the pin on saidfirst mentioned disk to move the notched portion thereof out of engagement With the end of said arm to permit the rotation of said impulse Wheel.

In Witness whereof, I hereunto subscribe my name this 23rd day of July, A. D. 1917.

JAMES A. WOTTON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D, G.

impulse Wheel 

